کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8090007 | 1521968 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Degradation and fate of N-nitrosamines in water by UV photolysis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Carcinogenic nitrosamines have received much attention due to their formation in CO2 capture processes and probable emission into the atmosphere. Fortunately, nitrosamines are decomposed by exposure to UV irradiation. This may be an effective strategy to degrade nitrosamines, forming more benign products in the process. In this work, UV photolysis was used to examine the degradation kinetics and fate of nitrosamines (i.e., N-nitrosodiethylamine (NDEA), N-nitrosodibutylamine (NDBA), N-nitrosodimethylamine (NDMA), N-nitrosodiethanolamine (NDELA), and N-nitrosopyrrolidine (NPYR)) in water at 40°C. Nearly all nitrosamines were decomposed within the first 10 min of photodegradation using 4 W, low pressure Hg lamp. Pseudo-first order reaction rate constants were 1.8 Ã 10â2, 2.6 Ã 10â2, 2.6 Ã 10â2, 2.3 Ã 10â2, and 1.4 Ã 10â2 L/W-min for NDEA, NDBA, NDMA, NDELA, and NPYR, respectively. There was minimal change in total organic carbon (TOC) and total nitrogen (TN), suggesting negligible loss of nitrosamines and photodegradation products by evaporation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Greenhouse Gas Control - Volume 52, September 2016, Pages 44-51
Journal: International Journal of Greenhouse Gas Control - Volume 52, September 2016, Pages 44-51
نویسندگان
Aqeel Afzal, Jia Kang, Bo-Mi Choi, Ho-Jin Lim,